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Dyfyniad Arddull ChicagoFrench, Jeff, Rowena Merritt, and Lucy Reynolds. Social Marketing Case Book. Los Angeles: Sage, 2011.
Dyfyniad MLAFrench, Jeff, et al. Social Marketing Case Book. Sage, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.